Question # 1

Diamond is...................

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conductor

non -conductor

both a and b

None of these

Aong the period which one of the followig decreases.

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Electronegativity

Ionization energy

Atomic radius

Electron affinity

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

A complete reaction is in which

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Only 10% reactants covert into products

All the reactants covrt into products

All the reactants do no covrt into products

Half reactants covert into produts

When acids react with metal with carbonates and bicarbonates which gas is produced.

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N2

H2

Cl2

CO2

Lanthanide series starts after the elemetn

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Osmium

Actinium

Lanthanum

None of these

The boiling point of water is

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O ^oC

100 ^oC

35 ^oC

25 ^oC

Point out the incorrect statement about electron affinity

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It decreases in a period

It decreases in a group

It is measure din kJmol-1

None of these

How many number of moles are equivalent to 8 gram of CO2.

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0.18

0.15

0.24

0.21

Second and third periods are called

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1st transition series

Normal periods

2nd transiion series

3rd transiliton serios

Aerobic respiration releases........energy than anaerobic respiration.

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Equal

Less

More

None of these

Water molecule show structure.

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Tetrahedral

Trigonal

Pentagonal

All of them

Blonde hair contains compounds of:

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molybdenum

iron

titanium

copper

Which is simplest alkane?

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CH₄

C₂H₈

C₂H₂

C₂H₄

The % age of drinkable water on earth is

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2.0%

0.02%

0.2%

5.0%

Which one is heterocyclic compound?

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Benzene

Cyclobutane

Thiophene

Nephthalene

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

Acute lead poisoning causes dysfunction of.

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Kidney

Liver

CNS

All of them

Which gas is used to manufacture king of chemicals sulphuric acid?

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N₂

O₂

Cl₂

S

Photosynthesis process produces.

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Starch

Cellulose

Sucrose

Glucose

Runcid butter has

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Foul smell

Rotten egg smell

Pungent smell

No smell

Halogenation of methane produces following valuable chemical compounds used as solvents except.

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Carbonterachloride

Chloroform

Carbon Black

Chloromethane

One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid

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Ether

Chloroform

Ethanol

Water

The unit of Kc for the reaction N2 +O2 = 2NO will be

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mol dm-3

mol-1 dm+3

mol-2 dm+6

No units

The rate of reaction

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Increases as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reaction proceeds

May decrease or increase as the reaction proceeds

Bond energy depends upon

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Electronegativity

Size of atom

Bond length

All of these

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

Kw for water at 0 oc is 0.1 x 10^-34 and at 100 ^oC 7.5 x 10^-14, How many times dissociation of water increase from 0 ^oCto 100 ^oC

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7.5 times

50 times

75 times

100 times

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

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Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

In the reaction 2Fe+3Cl2 ------------ FeCl2

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Fe is reduced

Fe is oxidized

Cl2 is oxidized

None of these happens

Butter is solution of

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Liquid in liquid

Solid and liquid

Liquid and solid

Liquid and gas

Which statement is true about Na and Na+

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size of Na is greater than Na+

Size of Na is smaller than Na+

Both have equal size

Both have same properties

Which one of the following does not react with dilute sulphuric acid.

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Mg (OH)2

Mg

MgO

Mg(NO3)2

What are the total numbers of periods in the modern periodic table

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3

5

7

8

Ionization energy of calcium is.

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Lower than that of barium

Lower than that of magnesium

Higher than that of beryllium

Lower than that of strontium

Which one of the following Lipids does not have glycerol backbone.

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Cholesterol

Oil

glycogen

Vitamin D

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

When Cu reacts with conc. HNO3 , which one of the following gases is evolved

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N2O

NO

NO2

N2O5

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Which substance is used to convert alcohol to alkyl halide.

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SOCl2

PCl3

HCl +ZnCl2

All of these

Ethyl alcohol on reacting with orthoboric acid form

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Ethyl borate

Boric acid

Boron acetate

Borax

Which of the following the highest hydration energy

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Li⁺

Na⁺

K⁺

Mg⁺⁺

Which is not coloured ion

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SO4^-2

MnO4-3

CrO4^-2

Cr2O7^-2